Lithium ion battery fire is a very unusual situation, but when it happens, it will cause a strong reaction and cause a lot of exposure. Whether it is a storage station or an electric bicycle, the cause of the battery fire may be the internal failure of the battery, not the battery itself. The main reason is thermal runaway. To know how to extinguish a fire, you must know what caused the battery to fail. The main reason for the lithium battery fire is that the heat in the battery is not released according to the design requirements, and the fire occurs after the ignition point of the internal and external combustion materials is reached. The main reasons are external short circuit, external high temperature and internal short circuit. How to deal with the ignition problem of lithium ion batteries? After fully understanding the cause of the lithium battery fire, we should propose how to extinguish the fire after the fire. There are four methods 1. Only a small fire is installed, the high-voltage battery part is not affected by the flame, and carbon dioxide or dry powder fire extinguishers can be used to extinguish the fire. 2. If the high-voltage battery is deformed or severely deformed when the fire is serious, the battery may be faulty. Then we must put out a lot of water to put out the fire. There must be a lot of water. 3. When checking the specific situation of the fire, do not touch any high-voltage components. It must be noted that the entire inspection is performed using insulated tools. 4. Be patient when extinguishing the fire. It may take a whole day. If there is a thermal imaging camera, it can be used. Thermal imaging cameras can be monitored to ensure that the high-voltage battery is completely cooled before the accident ends. If this is not the case, the battery should be monitored throughout the process until the lithium-ion battery pack no longer heats up. Make sure there is no problem after at least one hour. We need a lot of time and energy to make sure it doesn't happen again, but don't worry too much. Lithium batteries are not explosive. Generally speaking, such a big accident will not happen.